It's not easy man, and it only gets worse before it gets better! Stay smart, and that reason right there is why you shouldn't be out stunting...not for your own well being, but for your kid and your girl. All it takes is going down one time, and....fuck your FAMILIES life up in seek of a little thrill...
That's one of the hardest things to realize is you have a family now, it's not just you anymore.
One tip I would give you, every pay day, go out and buy one of the biggest boxes of diapers you can til you get around 4/5 boxes of one size, then move up to size 2...3.. it definitely helps. Save your reciepts on EVERYTHING you get, especially clothes. Sometimes you'll buy clothes and they'll out grow the damn things before they even get a chance to wear them, take those fuckers back.
It may all sound nickel and dimes now, but when you start adding up the $20 can of formula 2-3 times a month, $180 wk for child care(here in OK that's avg wk rate), $50-60 a month in diapers. Your looking at close to a grand a month just in necessities, then add your 2 week, 4 week, 2 mth, 4, and 6 mth dr appointments and then vaccines, clothes, furniture, toys, car seat, strollers, etc..etc.. My last bill for shots for my son was $680, and this is only his second set (4 mth check up).
BUT they are worth EVERY PENNY, AND EVERY MINUTE IN THOSE SLEEPLESS NIGHTS! Just remember that.